Nearly one billion pounds ($1.64 billion) of Iranian assets are frozen in Britain under international sanctions imposed against the country over its nuclear program.

"The total assets frozen in the UK under the EU (European Union) and UN sanctions against Iran are approximately 976,110,000 pounds," Ian Pearson, Britain's Economic Secretary to the Treasury said in a written statement to parliament on Thursday.

The statement did not give any further details.

The UN Security Council (UNSC) has imposed three rounds of sanctions against Iran as part of the West's efforts to halt Iran's nuclear program.

Tehran has repeatedly declared that it will not give up its legitimate nuclear rights under Western pressure.